Product Details
The Yokogawa AAR181-S00 S2, also cataloged as the AAR181 RTD Input Module, operates as a dedicated hardware component for 12-channel isolated temperature measurement acquisition within Yokogawa process control platforms. It processes direct resistance signals from field RTD sensors and converts electrical values for sub-rack bus distribution.
Suffix Breakdown & Model Matrix
| Code / Option | Description |
|---|---|
| Model: AAR181 | RTD Input Module (Isolated 12-channel) |
| -S | Standard type |
| 0 | Basic logic interface configuration |
| 0 | Basic functional execution level |
| S2 | Hardware revision level 2 |
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | AAR181-S00 S2 |
| Brand | Yokogawa |
| Origin | USA |
| Weight | 0.2 kg |
| Dimensions | 3.2 cm x 12.5 cm x 13.0 cm |
| Operating Temp | -20 to +70 deg C |
| Power Consumption | Max 450 mA at 5 VDC (backplane powered) |
| Number of Channels | 12 isolated channels |
| Signal Type | CH1 to CH12 RTD inputs |
| Allowable Input Voltage | +/-5 V |
| Measurement Accuracy | RTD: +/-120 mohm |
| Temperature Drift | RTD: +/-120 mohm / 10 deg C |
| RTD Excitation Current | 1 mA |
| Max Wiring Resistance | 40 ohm or less per wire |
| External Termination | Pressure clamp terminal block |
| Redundancy | Dual-redundant configuration support |
4-20 mA HART Loop Protocol and Channel Isolation
The AAR181-S00 S2 incorporates internal channel-to-channel isolation networks across all 12 input paths to prevent ground loop currents from destabilizing sensor conversion logic. Operating in Yokogawa DCS chassis alongside control modules processing 4-20 mA HART loop protocol signals, the board isolates millivolt-level RTD measurement circuits from high common-mode backplane noise. Continuous galvanic separation ensures consistent signal integrity across adjacent process input channels during fast scan execution cycles.
Frequently Asked Questions
Q: How is field sensor wiring terminated on the AAR181-S00 S2 module?
A: Physical wiring connects via a direct pressure clamp terminal assembly attached to the front interface of the module.
Q: What is the maximum allowable wiring resistance for each RTD lead?
A: The combined signal source and wiring resistance must not exceed 40 ohm per wire to maintain specified measurement accuracy.
Q: Is dual-redundant operation supported by the AAR181-S00 S2?
A: Yes, the module hardware design allows paired installation in dual-redundant sub-rack slots to execute continuous process signal tracking and switch-over.
Field Installation Guidelines
- ESD Protection: Always wear a grounded anti-static wrist strap before handling the circuit board assembly to prevent electrostatic discharge damage.
- Module Insertion: Align board edges with sub-rack chassis guides and push firmly until rear bus connectors fully lock into the backplane.
- Shield Grounding: Terminate RTD extension cable shielding at the designated system earthing bar inside the control cabinet to suppress external interference.
- Wiring Separation: Route low-level RTD input leads in dedicated raceways separated from high-voltage AC power cabling and inductive motor loads.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
Tech & Buying Guide
Essential Best Practices for PLC Wiring and Installation in Industrial Automation
Successful control system deployment begins with thoroughly reviewing manufacturer technical documentation. Controllers from major brands like Allen-Bradley, Siemens, and Schneider Electric feature unique terminal layouts. Engineers must verify voltage requirements before connecting power cables to prevent catastrophic equipment damage. Standard line connections require strict adherence to regional electrical codes and proper wire color coding. Furthermore, panel builders should always establish a robust low-impedance ground connection using at least 16-AWG copper conductor tied directly to the main plant grounding grid.
Demystifying Programmable Logic Controllers: Comprehensive Guide to PLC Classification and Selection in Industrial Automation
Modern industrial automation heavily relies on Programmable Logic Controllers (PLCs) to drive factory floor efficiency. Over my 15 years as an industrial automation expert working with DCS, TSI, and control systems, I have seen PLCs evolve into the central nervous system of modern manufacturing. Selecting the right controller requires a deep understanding of PLC types based on physical size, hardware architecture, and power supply configurations.
Comprehensive Guide to PLC Types in Modern Industrial Automation
Modern industrial automation relies on programmable logic controllers to govern critical factory operations. System integrators classify PLCs based on scale, hardware architecture, and power supply design. Understanding these core categories enables automation engineers to select the right control system architecture. Consequently, proper hardware selection optimizes performance while minimizing long-term operational costs.